Communications: electrical – Digital comparator systems
Patent
1993-02-26
1994-06-07
Zazworsky, John
Communications: electrical
Digital comparator systems
307362, 307471, G05B 103, G06F 702
Patent
active
053193482
ABSTRACT:
This invention relates to the MOS analog multi-bit comparator amplifier for performing the high speed digital multi-bit comparator function which is required, for example, in Cache Tag Random Access Memory of a computer system, and to the MOS analog XOR amplifier for performing the digital XOR function. The MOS analog comparator provided comprises N number of MOS analog XOR means for performing the digital XOR function and a MOS analog NOR means for performing the digital NOR function. The analog XOR provided comprises a constant current source; a first MOS switch having its source terminal connected to said constant current source, its gate terminal connected to the first input signal of said analog XOR amplifier; a first MOS differential pair having two input MOS transistors, the source terminals of said input MOS transistors being commonly connected to the drain terminal of said first MOS switch, one gate terminal of said input MOS transistors being connected to the second input signal of said analog XOR amplifier whilst the other gate terminal of said input MOS transistors being connected to the complementary signal of second input signal to said analog XOR amplifier; a second MOS switch having its source terminal connected to the source terminal of said first MOS switch, its gate terminal connected to complementary signal of said first input signal of said analog XOR amplifier; and a second MOS differential pair having two input MOS transistors, the source terminals of said input MOS transistors being commonly connected to the drain terminal of said second MOS switch, one gate terminal of said input MOS transistors being connected to the second input signal of said analog XOR amplifier whilst the other gate terminal of said input MOS transistors being connected to the complementary signal of the second input signal to said analog XOR amplifier. The analog XOR provided has advantage of high speed, low noise and easy implementation.
REFERENCES:
patent: 3955177 (1976-05-01), Miller
patent: 4450432 (1984-05-01), Schmidtpott et al.
patent: 4839841 (1989-06-01), Hagen et al.
patent: 4961067 (1990-10-01), Suzuki
Lee Sheau-Jiung
Yang Gene
Acer Incorporated
Zazworsky John
LandOfFree
Cache memory system, and comparator and MOS analog XOR amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cache memory system, and comparator and MOS analog XOR amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cache memory system, and comparator and MOS analog XOR amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-795810